import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import User from '../components/users/User.vue'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  { path: '/home', component: Home, redirect: '/welcome', children: [
    { path: '/welcome', component: Welcome },
    { path: '/users', component: User }
  ] }
]

const router = new VueRouter({
  routes
})

// 设置路由守卫
router.beforeEach((to, from, next) => {
  // 当前访问登录页
  if (to.path === '/login') return next()
  // 不存在token 情况
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) {
    next('/login')
  }
  // 存在token 放行
  next()
})

export default router
